<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="	https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css">
    <style>
        .red {
            color: red;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="container">
            <!-- 顶部搜索框模块 -->
            <div class="form-group">
                <div class="input-group">
                    <h4>品牌管理</h4>
                </div>
            </div>

            <!-- 数据表格 -->
            <table class="table table-bordered table-hover mt-2">
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>资产名称</th>
                        <th>价格</th>
                        <th>创建时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody v-if="list.length">
                    <!-- 渲染 -->
                    <tr v-for="(item,index) in list" :key="item.id">
                        <!-- 编号 -->
                        <td>{{item.id}}</td>
                        <!-- 资产名称 -->
                        <td>{{item.name}}</td>

                        <!-- 如果价格超过100，就有red这个类 -->
                        <td :class="{red:item.price>100}">{{item.price}}</td>
                        <!-- 创建时间 -->
                        <td>{{item.time}}</td>
                        <td><a href="#" @click.prevent="del(item.id)">删除</a></td>
                    </tr>
                    <tr style="background-color: #EEE">
                        <td>统计:</td>
                        <td colspan="2">总价钱为: {{total}}</td>
                        <td colspan="2">平均价: {{avg}}</td>
                    </tr>
                </tbody>
                <tfoot v-else>
                    <tr>
                        <td colspan="5" style="text-align: center">暂无数据</td>
                    </tr>
                </tfoot>
            </table>

            <!-- 添加资产 -->
            <form class="form-inline">
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" v-model="name" placeholder="资产名称" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" v-model="price" placeholder="价格" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <!-- 阻止表单提交 -->
                <button class="btn btn-primary" @click.prevent="add">添加资产</button>
            </form>
        </div>
    </div>
    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                name: "", // 名称
                price: 0, // 价格
                list: [{
                    id: 100,
                    name: "外套",
                    price: 199,
                    time: new Date('2010-08-12')
                }, {
                    id: 101,
                    name: "裤子",
                    price: 34,
                    time: new Date('2013-09-01')
                }, {
                    id: 102,
                    name: "鞋",
                    price: 25.4,
                    time: new Date('2018-11-22')
                }, {
                    id: 103,
                    name: "头发",
                    price: 19900,
                    time: new Date('2020-12-12')
                }],

            },
            methods: {
                // 删除数据
                del(id) {
                    this.list = this.list.filter(item => item.id !== id)
                },
                // 添加数据
                add() {
                    // 判空
                    if (!this.name || !this.price) {
                        alert('输入内容不能为空')
                        return
                    }
                    // 新对象
                    this.list.push({
                            id: 100 + this.list.length,
                            name: this.name,
                            price: this.price,
                            time: new Date(Date.now)
                        })
                        // 清空输入框内容
                    this.name = ''
                    this.price = ''
                }
            },
            computed: {
                total() {
                    return this.list.reduce((sum, item) => {
                        return sum += item.price
                    }, 0)
                },
                avg() {
                    return (this.total / this.list.length).toFixed(2)
                }
            },
            // 监听
            watch: {
                obj: {
                    deep: true,
                    immediate: true,
                    handler(newValue) {

                    }
                }
            }
        })
    </script>


</body>

</html>